Experimental Investigation on a Vapor Injection Heat Pump System with a Single-Stage Compressor

被引:4
作者
Liu, Hongzhi [1 ,2 ]
Nagano, Katsunori [2 ]
Katsura, Takao [2 ]
Han, Yue [2 ]
机构
[1] Univ Shanghai Sci & Technol, Dept Bldg Environm & Energy Engn, 516 Jungong Rd, Shanghai 200093, Peoples R China
[2] Hokkaido Univ, Environm Syst Res Lab, N13-W8, Sapporo, Hokkaido 0608628, Japan
基金
中国国家自然科学基金;
关键词
heat pump; vapor injection; gas-liquid separator; single-stage compressor; heating performance; PERFORMANCE ANALYSIS; REFRIGERANT INJECTION; FLASH-TANK; R410A; CYCLE; DESUPERHEATER; R32;
D O I
10.3390/en13123133
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
In this study, a heat pump of 10 kW with vapor injection using refrigerant of R410A was developed. A vapor injection pipe connecting a gas-liquid separator at the outlet of the main expansion valve and the suction of a single-stage rotary compressor was designed. The heating performance of this vapor injection heat pump was investigated and analyzed at different compressor frequencies and primary temperatures. The experimental results show that for the heat pump without vapor injection, the heating capacity increased linearly with the compressor frequency, while the heating coefficient of performance (COP) decreased linearly with the compressor frequency for each tested primary temperature. The developed vapor injection technique is able to increase the heat pump system's heating capacity and heating COP when the injection ratioRfalls into the range 0.16-0.17. The refrigerant mass flow rate can be increased in the vapor injection heat pump cycle due to the decreased specific volume of the suction refrigerant. The power consumption of vapor injection heat pump cycle almost remains the same with that of the conventional heat pump cycle because of the increased refrigerant mass flow rate and the decreased compression ratio. Finally, it was found that the developed vapor injection cycle is preferable to decreasing the compressor's discharge temperature.
引用
收藏
页数:19
相关论文
共 26 条
[1]  
[Anonymous], 2019, International energy outlook 2019.
[2]  
[Anonymous], 2008, CHEM BIOENG
[3]   Impact of control schemes of a monovalent inverter-driven water-to-water heat pump with a desuperheater in continental and subtropical climates through simulation [J].
Blanco, David L. ;
Nagano, Katsunori ;
Morimoto, Masahiro .
APPLIED ENERGY, 2013, 109 :374-386
[4]   Experimental study on a monovalent inverter-driven water-to-water heat pump with a desuperheater for low energy houses [J].
Blanco, David L. ;
Nagano, Katsunori ;
Morimoto, Masahiro .
APPLIED THERMAL ENGINEERING, 2013, 50 (01) :826-836
[5]   Performance comparison between R410A and R32 multi-heat pumps with a sub-cooler vapor injection in the heating and cooling modes [J].
Cho, Ii Yong ;
Seo, HyeongJoon ;
Kim, Dongwoo ;
Kim, Yongchan .
ENERGY, 2016, 112 :179-187
[6]   Comparison of the heating performance of air-source heat pumps using various types of refrigerant injection [J].
Heo, Jaehyeok ;
Jeong, Min Woo ;
Baek, Changhyun ;
Kim, Yongchan .
INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID, 2011, 34 (02) :444-453
[7]   Effects of flash tank vapor injection on the heating performance of an inverter-driven heat pump for cold regions [J].
Heo, Jaehyeok ;
Jeong, Min Woo ;
Kim, Yongchan .
INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID, 2010, 33 (04) :848-855
[8]  
Hundy G.F., 2016, REFRIGERATION AIR CO, P393
[9]   Performance analysis of single-stage air source heat pump utilizing indirect vapor injection design [J].
Lai, Jin-Chang ;
Luo, Win-Jet ;
Wu, Jyun-Yi ;
Faridah, Dini ;
Lin, Chia-Ming ;
Fasya, Fikri Rahmat ;
Nuriyadi, Muhammad ;
Ng, Wen-Bin .
ADVANCES IN MECHANICAL ENGINEERING, 2018, 10 (04)
[10]   Performance investigation of vapor and liquid injection on a refrigeration system operating at high compression ratio [J].
Lee, Daehui ;
Seong, Kyoung Jin ;
Lee, Jinho .
INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID, 2015, 53 :115-125